By Liz Kimbrough Deep in the rainforest, the monkeys are yodeling. Their wild calls echo across the foliage, sending signals of sex and survival. For decades, scientists have studied why they make ...

The new research has discovered that these vocal membranes, which are extremely thin and sit above the vocal folds in the larynx, allow monkeys to introduce "voice breaks" to their calls.

“These results show how monkeys take advantage of an evolved feature in their larynx—the vocal membrane—which allows for a wider range of calls to be produced, including these ultra-yodels ...

A “cheap trick” in their larynx means these monkeys will always beat humans, senior study author Jacob Dunn of the UK’s Anglia Ruskin University told reporters. Humans and monkeys have a pair of vocal ...

We no longer have these vocal membranes – we yodel only with our larynx. The study involved analysing CT scans, computer simulations and field work at La Senda Verde Wildlife Sanctuary in Bolivia.

Yodellers of the world, you never stood a chance: Monkeys will always be better at yodelling than humans because they have a "cheap trick" hidden in their voice box, scientists ...

Both humans, monkeys have a pair of vocal folds in their larynx which vibrate to create sound. Yodellers of the world, you never stood a chance: Monkeys will always be better at yodelling than ...

Both humans and monkeys have a pair of vocal folds in their larynx which vibrate to create sound. But monkeys have an additional pair of membranes that gives them a far wider pitch range, the ...

Micro-CT scans show the left half of the larynx of a black spider monkey (Ateles paniscus). The vocal membranes appear as thin upward extensions of the superficial vocal fold layer.